Lvl 60
What to say, what to say?
Well, I've been lvl 60 for about 8 days (game time) and it's allright, it's pretty different from being low level (something I feel everytime I play my alt)
My game sessions are spent like this:
-log on (in ironforge)
-chat a bit
-check auction hous
-sell/repair
-ask my friends if they are going to any high end instances
-if yes, I join them
-if no, I go looking for another group, or I go farming gold/thorium
lvl 60 for me is basically improving my character, so that I becomes as useful as possible in MC runs and against onyxia, azeurgos, kazzak etc..
I am getting low on goals though, I got my epic mount now (after some very hard questing) so now I have left to get to 300 in blacksmithing, and ofc, get better equipment..
Or I play my alt, whom is lvl 37 atm....
But lvl 60 is great fun! You can do whatever you want, go where ever you like, explore, and generally waste time

And as long as you have gotten good friends (like I have) then farming and instance runs are just fun
And I don't think they should raise the level cap, then they need to rework the talent system totally, and probably add some overpowered talents at the top of each talent tree. Also, they'd have to make new quests, instances, items, and zones. This, in my opinion, is not something that won't happen. And I also hope that it doesn't happen.
And concerning the "lvl 60 at each corner" remark: Well, what do you do when you have a lvl 70 at each, corner, or a lvl 80, or a lvl 100? You can't keep going like that, it's just ridiculous.